Valve.



3,1918. 2 sains-'sain 2.

Patented Sept.

VALVE. APPLIcAloN min Dic. 1. |915.

UNITED sTA'rns n tjnrnnr OFFICE.

FRED E. NORTON, O F WORCESTER, MASSAGHUSETTS. l

VALVE.

Specification of'Letters Patent. .Patented Split. 3, 1.918.

Application filed December 7, 1915. Serial No. 65.602,.

yTo all lwhom it may concern.' f

'lowing description, in connection1 with lthe 'nceonpnnylng drawm s,liso. specification,

like characters on the like parts.. 1

`Thisinvention relates to valves Which rawings representing "may be ofgenere] ap lication, but which are 'I'Jirtieulerly intende valves.' y iy In order that the principle of the invention may be readilyunderstood, I have disclosed en embodiment thereof in the aceompanyingdrawings, Wherein- Figure lis a plan view of e compressor or other valveconstructed in accordance With one .form ofv my .invention 5,

Fig. 2 isn central erosssection thereof;

Fig." 3 "avertie-rtl V section representing:

the' velvepositon in the eompresbeerV or other part with whichV it,'co,tiperete@ the -valve being open; and

' ligsi 4, 5 and 6 are views siniilztr to ,Figs. l,- und 3 respectively,the valve heingrep-l resented nsv having a greater lnunber of spires oreonvolutions. Compressor I.md` like valves have hereto-V l'ore beenprovided. They have commonly eonsistedrof a thin sheet steel.,pe1forateddisk, the' peripheral or other portion Vof the volvo being imperforzllieand nttnohed to '.1

solid cent-enh); variously shnpefi spring spirals or arms. This generaltypewof valve is known as the Hoobrigordli'glor type.

" Other lfornis or compressor-valves have been employed, one ot' ,whichcomprises :i flnt.`

thin, stee1l'plnte securodnt oneend end-PW sitioired with respect to aport in such man nerl that the discharge of nir is permitted bythebonding of the thin strip away frein the valve sent.` Those severalforms of velyes have the essentiel defect that ifthe,

spring" portion he madelong enough .to e1- low e fullY opening throughthe' port,'the oren` through tho valvel is ver much reduced for' n;given diameter. l also fail. from excessive defiection of mate rial,Vund it is impossible to secure-aJ fully satisfactory free port eren in'restricted space., y A

By my invention, I overcome' the defects -sont, no guido other thanV thevn-lvoitself 'bonif ruhhor. lont-.hor or othorsuitnblofilo coirvolutiousthe twospirals 4heir'igf d t uch valves in its preferredonibodill'ient IprovidenI valve whorool' omI port constitutes the vulve proper :rnd:urotluwr port eonstitl'xtos the "l being necessary. v f

lofmfring more purliculnrlylxo'the dilzrw-V ings, and lirsl to llmt formol" my invention A shown in Figs. 1, 2 nudv 3, l 'llave-thereinrepresented o. portion olf` `:in .nir or other 65 fluid compressor. hutil will lie obvious that my invention is in no Wise restrietod'to suchuse. 'lherrin ll have re]n'esontod"the 'vnlvesupport at l, `itlntvingfono or lriore o'peniruggs` 2 im' the upunrd poss-:ugent the airor other Huid through the' volvo eo'us' i:- tuting. my invention.lSurroluuling tho sufi-J port l is :i member 5 lowing' :l suitnlJleserie' of iiioll'ts' fl `through which the nir or otherl 5" iu'id'pnssos intothe oylindrie-.il or like poijl 75 tion of the comiwossor;'vThe onp eoetoti with the valve isrolirr-.sented nt'.4 itrhongf of .anysuitable forni nrndprrfsiiernbly :ir-ti ei'lso :is a stop or limitingmenus to the opel "5i" ing of the volvo.' l have"not"illu strnte theother. @meeting `portions of the ,con pressor, hntrit 'will bounderstood flint Vpr ernblyl-provide n cylinder'havingtlicrej" in npiston 'recipr-mnttofl. `toward inni.' from" the valve. Suela piston:Lots Irion its up` g5 ward stroke nivny' iron'i the valve to open theletter, ondupon its downwnrfl str( te' towm'dthe volvo lo close it. i lln this preferred :ind simplest forni, the; vulve ol my iuvontionfisronilmsedoi n plus* rnllty o'lE vintor-rolnl'ml flexible jnunobers,"whisrh pro'l'el'z'ihly. nre of sprn'gnimtl *inl* suehgls stool or 'otherinclini, butwvhiolinit metallic uu'lterinl lhsofirnbly I -provif twospirali lnoinhors indicated generally :it (i sind?. rlheso u'ieruhorsnreoif thin sheeti' nnitorinl. nre:snporposed, :ind enelfi is coinposedofnny suitable nnrnbcr-of spire' r" plnred in rotation with yresporl' 1o(inch 'ot-ln to n suil-pnlile amount, whiel-i preferarh'lol-).firgrrees. In that forni ot' my inver lon herein showilnthe .twospirals :tredispln i'o'the extent. indicnted, the spmfes-hetwe the spiros of enc-.l1 spiral being `indicated 8 :uid-,.9 respeetively;V @The1spit-"esilio rourse, he of any snit-.thin Ywidtl-inilgl not necessary'thatI the two or Vmore spire he `alike. They may `di'el in the width.of 110 the spires or in othel'rrespeets, not affecting* tho lnineipleofthe invention. 'Ilnpracticeg` the part of the spiral 7 of the valveconstitutes the valve seat and the art G constitutes the valve proper.It wi l be observed that in action no guide is required to secure thepropel' relative position of thev parts of the valvel other than thespirals themselves. Thus. all friction and wear incident to the movementof a valve along its guide is avoided.

It vwill be observed that when the valve 1s closed, the members and 7-overlap and when open the port is formed between the eonvblutions orspires of the two spirals. Thus, the seat is formed by the valveitselfand the support 1 for the. valve in its closed position in no wayperforms the usual function of a seat, the openings22 therein having noneeessaryrelation in form to the ports of the valve. The ports ofthe.valve, it will be observed, consist of two spiral or'v helical openingsin the `members 6, 7.

l Thus, no bridges or other obstructions exist to interfere with thefree passage of the air or other liquid. When open, the valve as sumes aconical form, as indicated in Fig. 3, wherein for sake of clearness thevalve is shown open to an exaggerated degree. The opening and closing ofthe valve are gradual and wit-hout shock.

The full opening through the valve supportmay be had through the valveports existing in the valve itself, and such opening is limited only bythemechanical strength of thel valve. The overlapping feature of thelnei'nbers 6 and 7 does not in any t restrict the port area. The rise ofthe vail/ve is determined entirely by the amount -of air passingtherethrough, and su-iiieient flexibility may be secured to make theresistance to the passage of air very slight. The flexible members G, 7may be of any desired length and the life of the valve correspondinglyis increased. The manu facture of the valve is also extremely simple,inasmuch as if desired the two or more spirals may be exactly-alike. Inthe forms of. my invention herein shown, the two spirals are exactduplicates .of each other.

Attheir outer edges the spirals 6, 7` are secured to the .support .1 bythecap 5. The valve my, however, be secured in position 5 ma' suita )leform. The support- 1, surrounding member 3 vandrap 5 may be of anysuitable form, since theyare rovided merel to afford a housing for t 1evalve. Their form and structure may depend on the function of the valve.

The form of valve shown iiui Figs. 4,5 and 6 differs from-that shown ilLFi n l, 2 and 3 o nlyin that I have provide spirals 10,11, each havinga greater, nurriber ofspires or eonvolutions. It is evident from aco1nparison of Fig. 6 with Fig. 3 that by prossuitable 1nanncr,f.\nd thestop o1tci1p lbe of the'form shown or of any other vidin a greaternumber of spires or convolutions, the deformation of the material of thevalve .is reduced by increasing the length of the spiral.

In Fi 4 and 5, the spaces between the ipires o the two spirals arerespectively int eated at 12 and 13. lf desired, the spirals may befastened to each other at their inner ends in any suitable manner, as,for example, by a rivet 14 indicated in Fig. 6'.

It is preferred to fasten the inner ends of the spirals in order thatwhen open they may assume their proper position, as previously stated.lVith respect to the form of the invention shown in Figs. 1, 2` and 3,it is notnecessary that the spirals be identical and the spaces betweenthe spires of one spiral may be greater than those between the spires ofthe other. As in the form of my invention shown in Figs. 1, 2 and 3, thespiral 10 constitutes the valve proper and the spiral 11 the seat, butthe space of the spaces between the spires of each member does notdetermine the form of the port when the valve is open,

T e spirals shown in the several figures may be formed in any suitablemanner, as, for example, by perforation of the material, by bending anarrow strip edgewise or by a combination of both methods. Obviously,the two or more spirals may be formed from separate pieces, such, forexample, as 6, 7, or 10, 11, or they may be formed from 011e piece, thecoils being made to overlap. In the latter case, the valve would notclose fiat, but would be of cylindrical or conical form, delgending uponthe winding of the spiral. ach spiral 6, 7, 10, 11, if distinct' fromthe eo-acting spiral, may be formed from a single piece or may beconstructed of two or more pieces.

Having thus described one illustrative einbodiment of my invention', Idsire it to be understood that although speeiic terms are employed, theyare used in ai? generic and descriptive sense and not 'for' 'urposes oflimitation, the sco e of the invention being set forth in the followingclaims.

1. A valve comprising a plurality of inter-related, spiral, flexlblemembers, the

spaces between the spires of the respective members being mutuallycovered by the other member.

2. A valve comprising a plurality of interl.

iro

form e valve sind sent, whereby the port is determined in Shape und urensolely by the sndmembers.

5. A valve comprising, in combination,`

:is e seat, 10 6. A valve eomprislng two spiral flexible -w il resilientmembers, one above the other, one serving as the valve proper and theother as the sent therefor.

In testimony whereof, I have signed my neme to this specification, inthe presence 0f 15 two subscribing Witnesses.

, FRED E. NORTON. iV itnesses:

C. F. STEVENS, MARY G. MoCAn'rnr.

